diff --git a/migrate_source_csv/tests/src/Unit/CSVFileObjectTest.php b/migrate_source_csv/tests/src/Unit/CSVFileObjectTest.php
index 2392aa9..74eff89 100644
--- a/migrate_source_csv/tests/src/Unit/CSVFileObjectTest.php
+++ b/migrate_source_csv/tests/src/Unit/CSVFileObjectTest.php
@@ -18,13 +18,18 @@ use org\bovigo\vfs\content\LargeFileContent;
 class CSVFileObjectTest extends CSVUnitTestCase {
 
   /**
-   * @var \Drupal\migrate_source_csv\CSVFileObject CSV file object.
+   * The CSV file object.
+   *
+   * @var \Drupal\migrate_source_csv\CSVFileObject
    */
-  protected $csv_file_object;
+  protected $csvFileObject;
 
+  /**
+   * {@inheritdoc}
+   */
   protected function setUp() {
     parent::setUp();
-    $this->csv_file_object = new CSVFileObject($this->happyPath);
+    $this->csvFileObject = new CSVFileObject($this->happyPath);
   }
 
   /**
@@ -35,9 +40,9 @@ class CSVFileObjectTest extends CSVUnitTestCase {
    * @covers ::__construct
    */
   public function create() {
-    $this->assertInstanceOf(CSVFileObject::class, $this->csv_file_object);
+    $this->assertInstanceOf(CSVFileObject::class, $this->csvFileObject);
     $flags = CSVFileObject::READ_CSV | CSVFileObject::READ_AHEAD | CSVFileObject::DROP_NEW_LINE | CSVFileObject::SKIP_EMPTY;
-    $this->assertSame($flags, $this->csv_file_object->getFlags());
+    $this->assertSame($flags, $this->csvFileObject->getFlags());
   }
 
   /**
@@ -49,9 +54,9 @@ class CSVFileObjectTest extends CSVUnitTestCase {
    */
   public function setHeaderRowCount() {
     $expected = 2;
-    $this->csv_file_object->setHeaderRowCount($expected);
+    $this->csvFileObject->setHeaderRowCount($expected);
 
-    return $this->csv_file_object->getHeaderRowCount();
+    return $this->csvFileObject->getHeaderRowCount();
   }
 
   /**
@@ -77,8 +82,8 @@ class CSVFileObjectTest extends CSVUnitTestCase {
    */
   public function countLines() {
     $expected = 15;
-    $this->csv_file_object->setHeaderRowCount(1);
-    $actual = $this->csv_file_object->count();
+    $this->csvFileObject->setHeaderRowCount(1);
+    $actual = $this->csvFileObject->count();
 
     $this->assertEquals($expected, $actual);
   }
@@ -115,7 +120,7 @@ class CSVFileObjectTest extends CSVUnitTestCase {
       '60.242.130.40',
     );
 
-    $csv_file_object = $this->csv_file_object;
+    $csv_file_object = $this->csvFileObject;
     $csv_file_object->rewind();
     $current = $csv_file_object->current();
     $this->assertArrayEquals($columns, $current);